Ground connecter



Nv 6, 192s.

A. P. FAHNESTOCK GROUND CONNECTER Filed May 15' 1926 mll i l UNITED STATESv n wing head 7.

Patented Nov. 6, 1928.

1,690,220 PATENT OFFICE. l

ARCHER rf. rAHNEsfrocK, or rLANDOME, NEW YORK. Y

l GROUND CONNECTER.

Application inea may 13, i926. serial No. 1083118.`

This invention.` relates to ground connectersof the .type intended to be clamped around a pipe or equivalent ground conductor.

An object of the invention is to provide an inexpensive practical connecter of this kind arrangements of parts, and applications of lprinciples constituting the invention; and

the scope of protection contemplated will aplplear from the claim.

the accompanying drawings, which are to be taken as part of this speciiicatiomand in which I have shown merely a preferred form of embodiment of invention,

Figure 1 is a horizontal sectional view through a pipe with a ground clamp embodyingmy invention in operative relation thereto; and

Fi 2 is a viewin side elevation illustratin me subject matter of Fig. A1, with the en s of the pi e broken away.

Referring to t e numerals on the drawing, 3 indicates a water, gas or other pipe, and encircling the same is a flexible band 4 formed of suitable sheet metal, provided` with spaced apertures 5 along its length. The two ends of the band are also apertured, and through these endapertures passes the threaded shank 6 of a screw, which is provided with a wing head 7. 8 indicates a nut interiorlythreaded to'correspond with the threading ofthe `screw 6, and 9 indicates a square washer which lies under the At some intermediate point in the length of the band I prefer to attach to the band a connecter or clip for a wire. In the drawing I have shown a familiar Fahnestock clip at 10, and the clip is secured to the band by means `of `a special rivet. As clearly shown in Fig. 1, the rivet has a head 11 which is upset against the outer surface of the clip portion through which the shank 12 of the rivet passes. The shank 12 also passes throu h the band 5 and beyond the inner face o thebandis enlarged to take the form lof avvcone, for example, *the point 13 of which is intended'to ybite intof'the opposed surface of pipe 4, piercing through any surface coating of the pipe to insure good electrical Contact. tact between the band and the pipe, and

Good surfaceV con? penetration of the pipe surface by the rivet point 13, is accomplished by drawing together the ends of the bandas indicated in Fig. 1. The shank 6 of the screw passes through the square washer 9, through the apertured ends of the band and into the square nut 8. Upon turning the screw 6 the band ends will be drawn together until the band tightly embraces the pipe, this'of course resulting incidently in drawing the point 13 of the rivet into the pipe surface. n the illustration of Fig. l the screw passes through the band ends, but it will of course be understood that .with pipes of smaller sizes the apertures 5 will be utilized in an obvious manner. l

The advantages of the construction above described will be clear, but it may be pointed out that the cone rivet serves a double function, that is, it holds the clip in mechanical v and electrical relation to the band and also ensures good electrical connection between the ground pipe, thefband and the clip. Furthermore, by reason of the fact that it penetrates the pipe,` it minimizes the liability of slippage of the band upon the ipe. v

The function of the square washer 9 is to preserve the adjacent band end against the destruction or disintegration due to the repeated manipulation of the screw; and the equipment of the screw with the wing headv 7 is important because thereby it becomes feasible to connect or disconnect the clamp without the use of any tools whatever.V

Inasmuch as many changes could be made in the above construction, and many ap-` tion which, as a matter of language, might be said to fall therebetween.

I claim:

In a ground Wire attachment, a pipe gripping band having a flat central portion and confronting arcuate portions on each side terminating in opposed outwardly projecting ends having registering holt receiving openings, said flat portion being disposed dian'ietrically opposite said ends and adapted to lie in spaced relation to the pipe on which the clamp is positioned, a rivet having a Leodaeo pointed head resting on the inside of the `flat portion of the band and adapted to have the point engage the material of the pipe, a ground Wire clamp resting on said flattened portion7 a second head on said rivet securing the ground wire clamp to the flattened portion, and a holt passing through the bolt openings to draw the ends together' and force the point of the rivet into the material of the pipe.

In testimony whereof I affix my signature.

ARCHER P. FAHNESTOCK. 

